Best Unit Test Way to Build a Website with Multiple Custom Types Using PHPUnit

Question

I am starting to learn how to use PHPUnit to test the website I'm working on. The problem I am facing is that I have five different types of users defined, and I need to be able to test each class with different types. I currently have a user class and I would like to pass this on to each function, but I cannot figure out how to pass this on or check out various errors that might return as correct or not.

Edit: I should have said. I have a user class and I want to pass a different instance of this class for each unit test.

Answer 1

If your different user classes are inherited from the parent class of the user, I recommend that you use the same inheritance structure for your test case classes.

Consider the following class examples:

class User
{
    public function commonFunctionality()
    {
        return 'Something';
    }

    public function modifiedFunctionality()
    {
        return 'One Thing';
    }
}

class SpecialUser extends User
{
    public function specialFunctionality()
    {
        return 'Nothing';
    }

    public function modifiedFunctionality()
    {
        return 'Another Thing';
    }
}

You can do the following with your test classes:

class Test_User extends PHPUnit_Framework_TestCase
{
    public function create()
    {
        return new User();
    }

    public function testCommonFunctionality()
    {
        $user = $this->create();
        $this->assertEquals('Something', $user->commonFunctionality);
    }

    public function testModifiedFunctionality()
    {
        $user = $this->create();
        $this->assertEquals('One Thing', $user->commonFunctionality);
    }
}

class Test_SpecialUser extends Test_User
{
    public function create() {
        return new SpecialUser();
    }

    public function testSpecialFunctionality()
    {
        $user = $this->create();
        $this->assertEquals('Nothing', $user->commonFunctionality);
    }

    public function testModifiedFunctionality()
    {
        $user = $this->create();
        $this->assertEquals('Another Thing', $user->commonFunctionality);
    }
}

Since each test depends on the create method, which you can override, and since test methods inherit from the parent test class, all tests for the parent class will run against the child class, unless you redefine them to change the expected behavior.

This did a great job in my limited experience.

Answer 2

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Answer 3

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